* Converts an x co-ordinate to an offset within a line.
* @param line The line
* @param x The x co-ordinate
*/
public int xToOffset(int line, int x) {
TokenMarker tokenMarker = getTokenMarker();
/* Use painter's cached info for speed */
FontMetrics fm = painter.getFontMetrics();
getLineText(line, lineSegment);
char[] segmentArray = lineSegment.array;
int segmentOffset = lineSegment.offset;
int segmentCount = lineSegment.count;
int width = horizontalOffset;
if (tokenMarker == null) {
for (int i = 0; i < segmentCount; i++) {
char c = segmentArray[i + segmentOffset];
int charWidth;
if (c == '\t') {
charWidth = (int) painter.nextTabStop(width, i)
- width;
} else {
charWidth = fm.charWidth(c);
}
if (painter.isBlockCaretEnabled()) {
if (x - charWidth <= width) {
return i;
}
} else {
if (x - charWidth / 2 <= width) {
return i;
}
}
width += charWidth;
}
return segmentCount;
} else {
Token tokens;
if (painter.currentLineIndex == line && painter.currentLineTokens != null) {
tokens = painter.currentLineTokens;
} else {
painter.currentLineIndex = line;
tokens = painter.currentLineTokens = tokenMarker.markTokens(lineSegment, line);
}
int offset = 0;
Toolkit toolkit = painter.getToolkit();
Font defaultFont = painter.getFont();